I googled for sometime and searched and seems NO ONE knows the size of that fitting. Anyone know the size of the oil drain fitting that comes out of the Novi1200 blower?

 

That's because the thread pitch and size is not an AN ... What people buy on the opposite (adapter) side is usually a AN male.

Try finding the superchargers mfg. Spec. Or keep looking. Or wait for more "chime"

 

3/8 is the size that goes into the blower drain. Paxton finally emailed me back.